// This works for vectors of types with fixed size.
// decimal is an exception because it is not supported by Buffer.BlockCopy.
public static void WriteVector <T> (RCArray <byte> result, RCArray <T> array, int size)
{
int length = (int)array.Count * size;
WriteScalarInt(result, array.Count);
result.Resize(length, 0);
Buffer.BlockCopy(array._source, 0, result._source, (int)result._count, length);
result._count += length;
}
public static void WriteVectorDecimal(RCArray <byte> result, RCArray <decimal> data)
{
WriteScalarInt(result, data.Count);
result.Resize(data.Count * sizeof(decimal), 0);
for (int i = 0; i < data.Count; ++i)
{
decimal val = data[i];
// This is horrible because a new byte[8] gets allocated for every
// element in this vector. But Buffer.BlockCopy does not work on
// decimal and I spent a silly amount of time googling for efficient
// ways to get the bits out one byte at a time, but that effort failed.
// I still think there is hope though.
int[] bits = decimal.GetBits(val);
Buffer.BlockCopy(
bits,
0,
result._source,
(int)result._count + i * sizeof(decimal),
sizeof(decimal));
}
result._count += data.Count * sizeof(decimal);
}